Stytch - Notice history

This incident has been resolved.

We experienced elevated SMS OTP errors and delays, affecting roughly 9% of all messages and about 14% of SMS and WhatsApp messages.

The SMS OTP errors have subsided. We will continue to monitor the situation while our primary messaging provider investigates the incident.

Issue

All SAML SSO Logins failed in the Stytch Platform.

Timeline

October 20th, 2025

16:30 - 18:01 UTC

Cause

A widespread outage in AWS created a knock-on effect that uncovered a latent certificate management issue within the Stytch SSO service. Other Stytch services, like the core Authentication API, responded appropriately in the face of downtime and continued to operate as expected. The result was that all SAML SSO login attempts during this incident returned an invalid certificate error and prevented users from logging in.

Remediation

Stytch updated the SSO service to handle certificate management so that it aligns with our other services that did not error. This reconfiguration will prevent this error from recurring in the event of AWS failure again in the future.

This incident has been resolved.

This incident has been resolved.

A bug was shipped at approximately 22:40Z that caused some email templates in Test Projects to enter an unexpected state and return a 500 when used to send an Email Magic Link.